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Re: 5-speed owners, does your car do this? (Wierd. (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Luc on November 04, 1999 at 03:25:05:

In Reply to: 5-speed owners, does your car do this? (Wierd...) posted by Tim Collins on November 04, 1999 at 00:40:10:

This mpg indicator is there to give you a fairly accurate mpg reading only while driving AT A STEADY PACE (on the trottle), not while cruising (idle).
Under acceleration the needle swings towards the right of the scale, and the mpg readings are completely unreliable; they can only serve as an indication of how hard you're accelerating at that moment.
Note the difference between the readings at idle and at full acceleration: at idle the needle is to the right, out of view; this IS NOT a reading. At full acceleration the needle is also at the right, out of view; this IS a reading, however out of scale.
So at idle while cruising or parked, the needle should go to the right, out of view, giving NO indication.
The mpg indicator is actually a direct indication of how much fuel the Motronic is injecting.
It will not give you an indication at idle. After all, who wants to know his fuel consumption at idle?
Luc.



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